Sights such as this can be found on many types of devices including weapons, surveying and measuring instruments, and navigational tools.
A number of excavated surveying instruments and measuring rods have yielded evidence of early cartographic activity.
The company manufactured different optical instruments, such as surveying instruments, microscopes and instruments for photogrammetry among others.
Lilley studied at Washington College before beginning a career selling surveying instruments invented by his father.
Surveying instruments and helmet binoculars were all we turned up, plus optical instruments confiscated in Terran labs.
He brought surveying instruments with him, but at first he did not seek surveying work, preferring to establish himself as a farmer upon his grant.
The two basic surveying instruments used to mark plots of land were a chain known as Gunter's chain and a compass.
Received authorization from Tokyo governor to convert the factory for production of civil products and reopened factory to manufacture binoculars and surveying instruments.
During the 1980's the company redesigned its main products, surveying instruments, to include lasers and other electronic means of measurement.
Complementing the display is a collection of surveying and drafting instruments that would have been used to create the maps.